22Watt Car Subwoofer Amplifier into 4 Ohm power amplifier, www.w3circuit.blogspot.com Variable Low Pass Frequency: 70 – 150Hz. This unit i...
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22Watt Car Subwoofer Amplifier
3 Volts Car Adapter Circuit Project
This 3 volts Car Adapter circuit is based on a standard LT1074CT switching regulator IC. The schematic shows the LT1074CT used as a positive...
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Plant Watering Watcher Circuit Project
This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turni...
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Easy Battery Maintainer Circuit Project
The author found that a long-neglect-ed gel battery in a hand-held vacuum cleaner had gone high-resistance. It took some effort to make it u...
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Solar Battery Charger
Here is a simple, solar charger circuit that uses a shunt regulator to prevent overcharging. Circuit uses a 12V solar battery, but can be ad...
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